Journal
PHYSICAL REVIEW A
Volume 79, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.79.053846
Keywords
photon antibunching; photon-photon interactions; stimulated emission
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Funding
- National Fundamental Research Program [2006CB921907]
- National Natural Science Foundation of China [60621064]
- Innovation Funds from Chinese Academy of Sciences
- Program for New Century Excellent Talents in University
- CAS
- Ministry of Science and Technology of China
- Foundation for the Author of National Excellent Doctoral Dissertation of PR China [200729]
- China Postdoctoral Science Foundation [20070420736]
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Photon bunching effect and stimulated emission of single photons is investigated and observed in the parametric amplification process. It is found that the two-photon interference is responsible for the photon bunching effect and stimulated emission, which is discussed in the temporal degree of freedom and in the presence of photon losses. Moreover, the direct measurement of the indistinguishability of two signal photons without any filtering is accomplished via the correlation between the two idler photons from two cascaded parametric down-conversion processes. This result shows that photon indistinguishability plays an essential role in stimulated emission.
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